Perovskite Sr2Fe1.5Mo0.5O6−δ as electrode materials for symmetrical solid oxide electrolysis cells

✍ Scribed by Qiang Liu; Chenghao Yang; Xihui Dong; Fanglin Chen

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 568 KB
• Volume: 35
• Category: Article
• ISSN: 0360-3199
• DOI: 10.1016/j.ijhydene.2010.08.016

✦ Synopsis

6Àd (SFM) has been successfully prepared by a microwave-assisted combustion method in air and employed as both anode and cathode in symmetrical solid oxide electrolysis cells (SOECs) for hydrogen production for the first time in this work.Influence of cell operating temperature, absolute humidity (AH) as well as applied direct current (DC) on the impedance of single cells with the configuration of SFMjLa 0.9 Sr 0.1-Ga 0.8 Mg 0.2 O 3 (LSGM)jSFM has been evaluated. Under open circuit conditions and 60 vol.% AH, the cell polarization resistance, R P is as low as 0.26 U cm 2 at 900 C. An electrolysis current of 0.88 A cm À2 and a hydrogen production rate as high as 380 mL cm À2 h have been achieved at 900 C with an electrolysis voltage of 1.3 V and 60 vol.% AH. Further, the cell has demonstrated good stability in the long-term steam electrolysis test. The results showed that the cell electrolysis performance was even better than that of the reported strontium doped lanthanum manganite (LSM) e yttria stabilized zirconia (YSZ)jYSZjNieYSZ cell, indicating that SFM could be a very promising electrode material for the practical application of SOEC technology.